The invention relates to a mechanical testing device with at least one load frame, which has a frame part and a clamping device held therein, in which a beam-shaped test specimen, in particular a rotor blade or rotor blade segment, can be clamped projecting through the load frame, the load frame being mounted in a first pivot bearing arrangement on a carrier frame or a support frame so as to be rotatable about a first transverse axis of the test specimen which extends perpendicularly to its longitudinal axis projecting through the clamping device, wherein the frame part has a four-fold rotational symmetry, in particular a square shape, or an annular shape. The design of the load frame(s) results in easy rotatability/adjustability of the test specimen. In a method for carrying out the test, the system natural frequencies in different loading directions can be suitably matched.

An alignment device (3) according to the present disclosure includes a laser emitter (31) that emits laser light (L) and is provided such that the laser light (L) reaches a position on a straight line extending in a vibrating direction from a tip of a stinger (12), the position being on the vibrating direction side from the tip, a laser receiver (32) that is provided to receive the laser light (L) reflected by an object (A) when the vibrator body (1) is installed such that the vibrating direction is a normal direction at a vibrating position on a surface of the object (A), and a controller (33) that determines whether an amount of the laser light (L) is a predetermined value or greater.

An alignment device (3) according to the present disclosure includes a laser emitter (31) that emits laser light (L) and is provided such that the laser light (L) reaches a position on a straight line extending in a vibrating direction from a tip of a stinger (12), the position being on the vibrating direction side from the tip, a laser receiver (32) that is provided to receive the laser light (L) reflected by an object (A) when the vibrator body (1) is installed such that the vibrating direction is a normal direction at a vibrating position on a surface of the object (A), and a controller (33) that determines whether an amount of the laser light (L) is a predetermined value or greater.

A vibration test platform for an automobile generator (13), the vibration test platform comprising: a vibration table (1), a driving device (2), and a tension device (3), wherein the vibration table (1) comprises a table body (11) and a movable coil (12) located in the table body (11), and the movable coil (12) extends out of an upper end surface of the table body (11); a generator (13) is fixedly provided on the table body (11), a rotating shaft of the driving device (2) is rotatably connected to a rotor of the generator (13) by means of a belt (4), and the tension device (3) applies a first tensile force to a stator of the generator (13); and when the movable coil (12) is stationary, a second tensile force of the belt (4) on the rotor and the first tensile force are in the same straight line, and have opposite directions and equal magnitudes, and the straight line is perpendicular to a vibration direction of the movable coil (12). The vibration test platform can perform a vibration test on the generator (13) in an automobile.

A vibration test platform for an automobile generator (13), the vibration test platform comprising: a vibration table (1), a driving device (2), and a tension device (3), wherein the vibration table (1) comprises a table body (11) and a movable coil (12) located in the table body (11), and the movable coil (12) extends out of an upper end surface of the table body (11); a generator (13) is fixedly provided on the table body (11), a rotating shaft of the driving device (2) is rotatably connected to a rotor of the generator (13) by means of a belt (4), and the tension device (3) applies a first tensile force to a stator of the generator (13); and when the movable coil (12) is stationary, a second tensile force of the belt (4) on the rotor and the first tensile force are in the same straight line, and have opposite directions and equal magnitudes, and the straight line is perpendicular to a vibration direction of the movable coil (12). The vibration test platform can perform a vibration test on the generator (13) in an automobile.